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肯定句、否定句和一般疑问句Havealook•Iamateacher.Ilikeapples.•Iamnotateacher.Idon’tlikeapples.•Isthisyourhandbag?Yes,itis.No,itisnot.•Doyoulikeapples?Yes,Ido.No,Idonot.Conclusion•陈述句：用于说明一个事实或表达说话人的看法或观点的句子。•陈述句分为肯定句和否定句。•肯定句表示肯定的意义；•Iamateacher.Ilikeapples.•主语+be+其他。•主语+动词+其他否定句表示否定意义，句中有否定词not,never等，表示“不”的意思。Iamnotateacher.Idon’tlikeapples.主语+be+not+其他。主语+don't+动词+其他。肯定句和否定句之间的转换1.如果肯定句中有be动词（am,is,are,was,were）、助动词have、has,或情态动词（can,could,must,will等）直接＋not即可得到相应的否定句。Exercise•Myfatherisataxidriver.→Myfatherisnot(isn’t)ataxidriver.•Hecanplayfootballverywell.→Hecannot(can’t)playfootballverywell.•MarywillcometoChinanextweek.→Marywillnot(won’t)cometoChinanextweek.•Ihavefinishedmyhomework.→Ihavenot(haven’t)finishedmyhomework.2.如果句子含有实义动词则需要借助助动词do,does或did＋not＋动词原形。•注意：do,does,did后面必须使用动词原形。肯定句和否定句之间的转换likeeatsingdance主语+do/dose/did+not+动词原形Exercise•Ilikelisteningtopopmusic.→Idon’t(donot)likelisteningtopopmusic.•Hegoestoworkeverymorning.→Hedoesn’t(dosenot)gotoworkeverymorning.•Lindadrovetoschoollastnight.→Lindadidn’t(didnot)drivetoschoollastnight.首页上页下页肯定句和否定句之间的转换肯定句和否定句之间的转换Ilikelisteningtopopmusic.Hegoestoworkeverymorning.肯定句和一般疑问句之间的转换Myfatherisataxidriver.→Isyourfatherataxidriver?Therearesomeapplesonthetable.→Arethereanyapplesonthetable?AsaBritish,hecanplayChinesechessverywell.→AsaBritish,canheplayChinesechessverywell?MarywillcometoChinanextweek.→WillMarycometoChinanextweek?找出两句话间的联系•一般疑问句：可以直接用yes或no来回答的疑问句，这种疑问句句末多用升调。•Isthisyourhandbag?Yes,itis.No,itisnot.Doyoulikeapples?Yes,Ido.No,Idonot.•一般疑问句的结构：be动词/助动词/情态动词+主语+谓语/表语+其他？（be/do/dose/did/can/could+主语+谓语+其他）•Yes,主语+be动词/助动词/情态动词No,主语+be动词/助动词/情态动词+not2.如果句子中的谓语动词为实义动词，则需要借助助动词do,does或did，将它们放在句首，并将句中实义动词变为原形。•Ilikelisteningtopopmusic.→Doyoulikelisteningtopopmusic?•Hegoestoworkeverymorning.→Doeshegotoworkeverymorning?•Lindadrovetoschoollastnight.→DidLindadrivetoschoollastnight?•◆注意：do,does,did后面必须使用动词原形。Exercise找到了没找到加dodoes第二步：提提句首（大写）①“句号”改“问号”②如果有第一、第二人称，则互改。第三步：改其他照抄一字不漏第四步：抄第一步：找找be动词、have、has、情态动词如何改一般疑问句？上页下页首页基本概念肯定句和否定句之间的转换肯定句和一般疑问句之间的转换练习肯定句、否定句和一般疑问句•将下列句子变为否定句•1.Thedogisbiggerthanthecat.•Thedog________________biggerthanthecat.答案：Thedogisnotbiggerthanthecat.2.MyEnglishteacherspeaksEnglishveryfast.•MyEnglishteacher________________Englishveryfast.答案：MyEnglishteacherdoesn’tspeakEnglishveryfast.•3.Hecaneatthreehamburgersatatime.•He________________eatthreehamburgersatatime.答案：Hecannoteatthreehamburgersatatime.上页下页首页•4.Susiefoundsomemoneyonherwaytoschool.Susie________________________moneyonherwaytoschool.答案：Susiedidn’tfindanysomemoneyonherwaytoschool.•5.Myfatherisveryhard-working.Myfather________veryhard-working.答案：Myfatherisn’tveryhard-working.上页下页首页•6.Grandpatellsstoriestouseveryevening.______________________________________________________.答案：Grandpadoesn’ttellstoriestouseveryevening.•7.Theyweretalkingloudlyat10:00p.m.yesterday.______________________________________________________.答案：Theywerenottalkingloudlyat10:00p.m.yesterday•8.Icandomyhomeworkfast.______________________________________________________.答案：Icannotdomyhomeworkfast.•9.Heatetoomuchattheparty.______________________________________________________.答案：Hedidn’teattoomuchattheparty.上页下页首页•10.Hedoesn’tliveinLondonwithhisuncle.______________________________________________________.11.Thereissomewaterinthecup.•______________________________________________________.•12.Ireadbookseveryday.•______________________________________________________.•13.Petergoestothezooonceayear.•______________________________________________________.•14.Therewillbeameetingnextmorning.•_______________________________________________________.•15.Heisgoingtobeateacherinthefuture.•_______________________________________________________.首页上页下页•将下列句子变成一般疑问句•1.HetookmanyphotosinfrontoftheSummerPalace.____he____manyphotosinfrontoftheSummerPalace?答案：DidhetakemanyphotosinfrontoftheSummerPalace?•2.TheEarthmovesaroundtheSun.____theEarth____aroundtheSun?答案：DoestheEarthmovearoundtheSun?上页下页首页•3.Therearemanysupermarketsinthecity.______________supermarketsinthecity?答案：Aretheremanysupermarketsinthecity?4.Wemustsendhimtothehospitalatonce._____we_____himtothehospitalatonce?答案：Mustwesendhimtothehospitalatonce?•5.Tomusuallygetsupat11:00a.m.onSundays._____________________________________________答案：DoesTomusuallygetupat11:00a.m.onSundays?6.Iwrotealettertomyunclethedaybeforeyesterday._____________________________________________答案：Didyouwritealettertomyunclethedaybeforeyesterday?上页下页首页